Though we don't typically associate cancers and diseases with smells, doctors and researchers have long-known there are certain odors in a person's breath, sweat and even urine that go along with different illnesses.

Keep clicking to see what diseases have smells associated with them.

Diabetes: Researchers say the breath of someone with diabetes can smell like nail polish remover. less

In early 2014, scientists developed an electronic 'nose'... Photo-6005573.81729 - Houston Chronicle

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Ketoacidosis (starvation)

People who are starving (and we're not just talking about the "I wish lunchtime would hurry up already" variety) undergo a life-threatening process called ketoacidosis. One symptom is sweet, fruity or acetone-like smelling breath.

This is a problem typically associated with people who have diabetes. Ketoacidosis occurs when the body cannot use the glucose (or sugar), so it uses the fat instead. Ketones, which are the byproducts of the fat breakdown, then builds up in the body.

People who suffer from an pseudnomonas infection (which is caused by a common bacteria attributed to swimmer's ear; it usually doesn't harm people but can turn deadly) can emit a grape odor from their skin and sweat.